diff --git a/cameleer3-server-app/src/main/java/com/cameleer3/server/app/diagram/ElkDiagramRenderer.java b/cameleer3-server-app/src/main/java/com/cameleer3/server/app/diagram/ElkDiagramRenderer.java
index 506a81ab..502c83e5 100644
--- a/cameleer3-server-app/src/main/java/com/cameleer3/server/app/diagram/ElkDiagramRenderer.java
+++ b/cameleer3-server-app/src/main/java/com/cameleer3/server/app/diagram/ElkDiagramRenderer.java
@@ -242,6 +242,7 @@ public class ElkDiagramRenderer implements DiagramRenderer {
             handlerRoot.setProperty(CoreOptions.DIRECTION, rootDirection);
             handlerRoot.setProperty(CoreOptions.SPACING_NODE_NODE, NODE_SPACING * 0.5);
             handlerRoot.setProperty(CoreOptions.SPACING_EDGE_NODE, EDGE_SPACING * 0.5);
+            handlerRoot.setProperty(CoreOptions.HIERARCHY_HANDLING, HierarchyHandling.INCLUDE_CHILDREN);
             handlerRoot.setProperty(org.eclipse.elk.alg.layered.options.LayeredOptions.NODE_PLACEMENT_STRATEGY,
                     NodePlacementStrategy.LINEAR_SEGMENTS);